And since this happened in Australia, the cops decide to search his vehicle. After he showed them his mask exemption. (You only have the rights that the .gov and cops say you have.)
Aussie Cossak is another independent journalist from Australia. He has been filming the police, and has at least 1 complaint active against an officer from his local police station. So of course, the rest can't let that stand. He has been questioning (and mocking) their authority. So they have searched his car at every opportunity, and even arrested him at one point.
Here is the video: Bunnings Karen calls Crimestoppers! (Full version)